Dad's CPAP Guide

What is cmH₂O? The pressure unit this machine uses. 1 cmH₂O = the pressure to push water up 1 cm. Very gentle — like blowing softly through a straw. Typical range is 6–12 cmH₂O.

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Controls — only 2

Start / Stop button 启动/停止

On home screen → starts therapy
During therapy → stops therapy
Hold this + knob together → opens the hidden pressure/mode menu

Rotary knob 旋钮

Turn → move cursor or change a value
Press → select or save
When a setting is editable, the text turns orange

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Home Screen Tiles

What you see on the screen when the machine is on but not running therapy.

Preheat 预加热

Warms the water ~10 min before bed
Humidity 加温加湿

Moisture level 0–6. Start at 2–3.
Ramp 延时升压

Pressure starts low, climbs slowly. Set 20–30 min.
Settings 设置

Language, brightness, units, factory reset
Info 信息

View AHI score, hours used, session length
Alerts 提示

Warning thresholds — leave at defaults

Humidity levels

0Off
1–2Light · Start here
3–4Medium · good for air-con rooms
5–6High · risk of water dripping in tube

Water rule Distilled water only. No tap water. Change daily. Fill between MIN and MAX lines — never overfill.

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Setting Pressure & Mode

How to enter the pressure menu On the home screen — hold Start (启动) and the knob at the same time. Hold until the menu appears.

Choose a mode 通气模式

CPAP — Fixed pressure

One pressure all night. Best once a doctor has prescribed the exact number.

APAP — Auto pressure ← use this

Sets a min and max range. Machine adjusts automatically — raises when it detects apnea, lowers when breathing is fine. Best for beginners.

S / T / ST — Bi-level (doctor-prescribed only)

Two pressures: one for inhale, one for exhale. Only use if a doctor has specifically prescribed it.

APAP pressure settings

Initial pressure 初始压力

Starting pressure (before ramp climbs). Must be ≤ min pressure.

4.0
Min pressure 最小治疗压力

Lowest the machine will go when breathing is normal.

4.0
Max pressure 最大治疗压力

Highest it will go when apnea is detected.

12.0

All in cmH₂O · Adjust in steps of 0.5 · Range 4–25

After 1–2 weeks, check the Info screen → AHI. If it's still above 5, raise max to 14.0 and monitor another week.

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Readings Explained

AHI AHI指数

Goal < 5

The most important number. Apnea events per hour — how many times breathing stopped or became shallow.

Normal
<5

Mild
5–15

Moderate
15–30

Severe
>30

Check this every morning via Home → Info (信息).

Tidal Volume (VT) 潮气量

400–600 mL

Air per single breath. Below ~300 mL = check for leaks or obstruction.

Leakage 漏气量

< 24 L/min

Air escaping the mask per minute. High leakage = mask fit problem, not a pressure problem. Reposition the mask.

Minute Ventilation (MV) 分钟通气量

4–8 L/min

Total air moved per minute (= VT × RR). Too low = not enough air moving.

Respiratory Rate (RR) 呼吸频率

10–16 /min

Breaths per minute during sleep. Consistently low RR → check AHI for apnea.

T&H Level 加温加湿

Comfort only

No medical target. Dry mouth in morning → go up. Water dripping in tube → go down.

Quick diagnosis High leakage + low VT → fix the mask seal.
Normal leakage + low MV → may need higher max pressure.
Low RR + high AHI → apnea events happening, check pressure settings.

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Cleaning & Maintenance

Always turn off and unplug before cleaning. Never submerge the main unit.

Daily

Humidifier waterEmpty and refill with fresh distilled water

Weekly

Humidifier

Soak in mild detergent · rinse with water ≤41°C · air dry
Tube

Rinse inside · hang to dry away from sunlight
Air filter

Replace when grey/dirty. Replace immediately if torn.
Main unit

Wipe with damp cloth · dry before use

Every time you move it

Empty humidifierWater spills into the machine if tilted

No ethanol above 75%. No bleach. Never clean while plugged in. All parts must be fully dry before reassembling.

Warranty: Main unit 2 years · Adapter 1 year · Humidifier 90 days
Supplier: 0318-8581858 (Mon–Fri 8:30–11:30, 14:30–17:30)

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First Week Checklist

Setup — do once

Enter pressure menu (hold Start + knob) → set mode to APAP
通气模式
Set initial pressure → 4.0, min → 4.0, max → 12.0
初始/最小/最大治疗压力
Home screen → Ramp (延时升压) → set 20–30 min
Home screen → Humidity (加温加湿) → set level 2–3
Fill humidifier with distilled water (between MIN and MAX lines)
Insert SD card (side slot) — logs therapy data

Every morning

Home → Info (信息) → check AHI
Goal: below 5. Also check Average Leak — if high, adjust mask fit.
Empty humidifier water, refill with fresh distilled water

After 7–14 days

AHI consistently < 5 and Dad sleeps well → you're done.

AHI still high → raise max pressure to 14.0–15.0 and monitor another week.

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Error Messages

系统泄漏 Large air leak
→ Check tube connections at both ends
管路堵塞 Tube blocked
→ Check tube is not kinked or squashed
管路脱落 Tube disconnected
→ Reconnect tube to the air outlet
压力过高 / 压力过低 Pressure sensor fault
→ Restart machine. Still showing? Call supplier.
电源故障 Power fault
→ Check adapter and power cord
电机异常 Motor fault
→ Restart. Still showing? Call supplier: 0318-8581858

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Warning Signs — Stop & Call Doctor

Stop using immediately if: Chest pain · Severe headache · Breathing getting worse · Viral or upper-airway infection

Do not use if: Collapsed lung · Severe respiratory failure · Active nosebleed · Recent facial/nasal surgery · Very low blood pressure or shock

Fire risk Keep at least 1 metre from open flame or supplemental oxygen. No smoking near the machine.

This is not a life-support device. A power cut will not cause an emergency — the machine simply stops.